Local Buckling On The Influence Of Temperature Variation On The Concrete Filled Square Steel Tubular Short Columns

Concrete filled steel tube is a new type of steel and concrete composite structure,which has been used for about 100 years,and now it has been widely used in steel tube.Because the steel tube concrete steel tube is restricted by the core concrete,it is in the three direction,the core concrete bearing capacity is improved,the core concrete makes the outer convex deformation,and slow the local buckling of the steel tube.However,because of the thin steel tube wall is thin,the bending stiffness is lower,the steel plate is prone to local buckling,which will weaken the overall performance of the component,and it is necessary to analyze the local buckling of steel tube concrete filled steel tube.In this paper,the local buckling critical load and critical temperature variation of the steel sheet under normal temperature are obtained by using the energy method.The main work of this paper is as follows:1.Introduces the characteristics of steel pipe concrete and the use of the current situation and the research situation of the concrete filled steel tube at home and abroad.2.The local buckling of concrete filled steel tubular short column under normal temperature was analyzed,and the core concrete was assumed to be a rigid material,and the boundary conditions of the plate were determined.3.Concrete filled steel tubular short columns are analyzed under the action of temperature variation.The core concrete is assumed to be rigid,and the boundary conditions of the steel plate are fixed.4.The local buckling of concrete filled steel tubular short columns under the action of external force and temperature is analyzed,and the critical temperature variation of local buckling is solved by using the conclusion.